package com.zyx.yygh.cmn.service.impl;

import com.alibaba.excel.EasyExcel;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.zyx.yygh.cmn.listener.DictListener;
import com.zyx.yygh.cmn.mapper.DictMapper;
import com.zyx.yygh.cmn.service.DictService;
import com.zyx.yygh.model.cmn.Dict;
import com.zyx.yygh.vo.cmn.DictEeVo;
import org.springframework.beans.BeanUtils;
import org.springframework.cache.annotation.CacheEvict;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;
import org.springframework.web.multipart.MultipartFile;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletResponse;
import java.util.ArrayList;
import java.util.List;

/**
 * @author zyx
 * @version 1.0
 * @date 2022/1/20 020 12:42
 */
@Service
public class DictServiceImpl extends ServiceImpl<DictMapper, Dict> implements DictService {

    @Resource
    private DictMapper dictMapper;

    @Override
    @Cacheable(value = "dict", keyGenerator = "keyGenerator")
    public List<Dict> findChildData(Long id) {

        QueryWrapper<Dict> wrapper = new QueryWrapper<>();
        wrapper.eq("parent_id", id);
        List<Dict> dictList = baseMapper.selectList(wrapper);

        for (Dict dict : dictList) {
            Long dictId = dict.getId();
            boolean isChild = this.isChildren(dictId);
            dict.setHasChildren(isChild);
        }

        return dictList;
    }

    @Override
    public void exportDictData(HttpServletResponse response) {
        try {
            //设置下载信息
            response.setContentType("application/vnd.ms-excel");
            response.setCharacterEncoding("utf-8");
            // 这里URLEncoder.encode可以防止中文乱码 当然和easyexcel没有关系
            String fileName = "dict";
            response.setHeader("Content-disposition", "attachment;filename=" + fileName + ".xlsx");
            //查询数据库
            List<Dict> dictList = baseMapper.selectList(null);
            List<DictEeVo> list = new ArrayList<>();
            for (Dict dict : dictList) {
                DictEeVo dictEeVo = new DictEeVo();
                BeanUtils.copyProperties(dict, dictEeVo);
                list.add(dictEeVo);
            }
            EasyExcel.write(response.getOutputStream(), DictEeVo.class).sheet("dict")
                    .doWrite(list);

        } catch (Exception e) {
            e.printStackTrace();
        }


    }

    @Override
    @CacheEvict(value = "dict", allEntries = true)
    public void importData(MultipartFile file) {
        try {
            EasyExcel.read(file.getInputStream(), DictEeVo.class, new DictListener(baseMapper)).sheet().doRead();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @Override
    public String getDictName(String dictCode, String value) {

        //如果dictCode为空，直接根据value查询
        if(StringUtils.isEmpty(dictCode)) {
            //直接根据value查询
            QueryWrapper<Dict> wrapper = new QueryWrapper<>();
            wrapper.eq("value",value);
            Dict dict = baseMapper.selectOne(wrapper);
            return dict.getName();
        } else {//如果dictCode不为空，根据dictCode和value查询
            //根据dictcode查询dict对象，得到dict的id值
            Dict codeDict = this.getDictByDictCode(dictCode);
            Long parent_id = codeDict.getId();
            //根据parent_id和value进行查询
            Dict finalDict = baseMapper.selectOne(new QueryWrapper<Dict>()
                    .eq("parent_id", parent_id)
                    .eq("value", value));
            return finalDict.getName();
        }
    }

    @Override
    public List<Dict> findByDictCode(String dictCode) {

        Dict dict = this.getDictByDictCode(dictCode);
        List<Dict> childData = this.findChildData(dict.getId());
        return childData;
    }

    private Dict getDictByDictCode(String dictcode) {
        QueryWrapper<Dict> wrapper = new QueryWrapper<>();
        wrapper.eq("dict_code", dictcode);
        Dict codeDict = baseMapper.selectOne(wrapper);
        return codeDict;
    }

    /**
     * 判断id下是否有子节点
     */
    private boolean isChildren(Long id) {

        QueryWrapper<Dict> wrapper = new QueryWrapper<>();
        wrapper.eq("parent_id", id);

        Integer integer = baseMapper.selectCount(wrapper);

        return integer > 0;
    }
}
